Installation Structure of Bed Board and Method for Installing Bed Board

Abstract

To improve quality of connection between floor slabs.SOLUTION: In a floor slab installation structure 1 which connects a first floor slab 110 and a second floor slab 120, the first floor slab 110 having a first side surface 113, the second floor slab 120 having a second side surface 123, the side surfaces facing each other with a gap gh, an upper support member 11 which supports the first floor slab 110 and the second floor slab 120 across a top surface 111 of the first floor slab 110 and a top surface 121 of the second floor slab 120 and a lower support member 12 which supports the first floor slab 110 and the second floor slab 120 across a bottom surface 112 of the first floor slab 110 and a bottom surface 122 of the second floor slab 120 are fastened with a fastening member 14, to fix the first floor slab 110 and the second floor slab 120 so as not to be moved, thereby improving quality of connection between the floor slabs.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a floor slab erection structure and a floor slab erection method.

Background Art

[0002] In widening work, repair work, etc., a technique has been proposed in which a plurality of floor slabs are installed and the plurality of installed floor slabs are connected to each other. For example, in Patent Document 1, between the gaps of two floor slabs, a temporary covering board 3 along the upper surfaces of the two floor slabs, a reinforcing beam member 4 along the lower surfaces of the two floor slabs, and a connecting bolt 5 for fastening the temporary covering board 3 and the reinforcing beam member 4 are attached, and a hollow joint portion 2 is formed. The connecting bolt 5 and the reinforcing beam member 4 are removed, and the formwork 8 is installed on the lower surfaces of the two floor slabs with only the temporary covering board 3 placed, and the filling concrete is placed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above-described technique, any one of the plurality of installed floor slabs or an area adjacent to the plurality of installed floor slabs may be used as a road for vehicle passage. In such a case, the installed floor slabs may move due to the vibration caused by vehicle passage.

[0005] Therefore, an object of the present invention is to provide a floor slab erection structure and a floor slab erection method capable of improving the quality of connection between floor slabs.

Means for Solving the Problems

[0006] The present invention is a floor slab erection structure for connecting a first floor slab and a second floor slab while opposing the side surface of the first floor slab and the side surface of the second floor slab with a gap therebetween, and includes an upper support member that supports the first floor slab and the second floor slab across the upper surfaces of the first floor slab and the second floor slab, a lower support member that supports the first floor slab and the second floor slab across the lower surfaces of the first floor slab and the second floor slab, and a fastening member that fastens the upper support member and the lower support member. The upper support member has a first upper contact portion that contacts the upper surface of the first floor slab, a second upper contact portion that contacts the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper contact portion and the second upper contact portion. The lower support member has a first lower contact portion that contacts the lower surface of the first floor slab, a second lower contact portion that contacts the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower contact portion and the second lower contact portion.

[0007] According to this configuration, in a floor slab erection structure for connecting a first floor slab and a second floor slab while opposing the side surface of the first floor slab and the side surface of the second floor slab with a gap therebetween, an upper support member that supports the first floor slab and the second floor slab across the upper surfaces of the first floor slab and the second floor slab and a lower support member that supports the first floor slab and the second floor slab across the lower surfaces of the first floor slab and the second floor slab are fastened by a fastening member, and the first floor slab and the second floor slab are fixed so as not to move. Therefore, the quality of the connection between the floor slabs can be improved.

[0008] In this case, it is preferable to further include a pipe member that is disposed in the gap and extends in the vertical direction, and a filling solidified body that is filled outside the pipe member in the gap. The fastening member preferably extends across the upper bridging portion and the lower bridging portion inside the pipe member.

[0009] According to this configuration, in a state where the first floor slab and the second floor slab are fixed so as not to move by the upper support member and the lower support member, the filling solidified body is filled outside the pipe member, and the fastening member is separated from the filling solidified body inside the pipe member. Therefore, the influence of vibration such as vehicle passage on the placement and curing of the filling solidified body in the gap is reduced, and the quality of the connection between the floor slabs can be improved.

[0010] Further, it is preferable that either one of the first upper contact portion and the second upper contact portion is configured by a member separated from the upper bridging portion.

[0011] According to this configuration, since either one of the first upper contact portion and the second upper contact portion is configured by a member separated from the upper bridging portion, it is easy to cope with fluctuations in the angle between the first floor slab and the second floor slab due to vibrations and construction errors, etc.

[0012] Further, it is preferable that either one of the first lower contact portion and the second lower contact portion is configured by a member separated from the lower bridging portion.

[0013] According to this configuration, since either one of the first lower contact portion and the second lower contact portion is configured by a member separated from the lower bridging portion, it is easy to cope with fluctuations in the angle between the first floor slab and the second floor slab due to vibrations and construction errors, etc.

[0014] Furthermore, the present invention is a method for installing floor slabs that connect a first floor slab and a second floor slab while facing the side surface of the first floor slab and the side surface of the second floor slab with a gap therebetween, the method including: a first floor slab installation step of installing the first floor slab; a second floor slab installation step of installing the second floor slab while facing the side surface of the first floor slab installed in the first floor slab installation step and the side surface of the second floor slab with a gap therebetween; an upper support member arrangement step of arranging an upper support member that supports the first floor slab and the second floor slab across the upper surface of the first floor slab installed in the first floor slab installation step and the upper surface of the second floor slab installed in the second floor slab installation step; a lower support member arrangement step of arranging a lower support member that supports the first floor slab and the second floor slab across the lower surface of the first floor slab installed in the first floor slab installation step and the lower surface of the second floor slab installed in the second floor slab installation step; and a fastening step of fastening the upper support member arranged in the upper support member arrangement step and the lower support member arranged in the lower support member arrangement step with a fastening member. In the upper support member arrangement step, an upper support member having a first upper abutting portion that abuts against the upper surface of the first floor slab, a second upper abutting portion that abuts against the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper abutting portion and the second upper abutting portion is arranged. In the lower support member arrangement step, a lower support member having a first lower abutting portion that abuts against the lower surface of the first floor slab, a second lower abutting portion that abuts against the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower abutting portion and the second lower abutting portion is arranged.

[0015] In this case, in the fastening step, the upper bridging portion and the lower bridging portion are fastened by a fastening member that extends across the upper bridging portion and the lower bridging portion inside a pipe member that extends in the vertical direction in the gap. It is preferable to further include a plugging step of filling the outside of the pipe member in the gap with a plugging solidifying material to generate a plugged solid after the fastening step.

[0016] In this case, it is preferable to further include a removing step of removing the fastening member after the plugging step and a hole filling step of filling a hole formed in the plugged solid by the pipe member with a filling material after the removing step.

[0017] According to this configuration, in the removal process, after the plugging process, the fastening member that extended across the upper support member and the lower support member inside the pipe member is removed. Therefore, the plugging solidified body filled outside the pipe member in the plugging process does not become an obstacle, and the fastening member can be removed easily. In the hole filling process, after the removal process, the hole formed in the plugging solidified body by the pipe member is filled with a filler. Therefore, after the removal process and the hole filling process, the gap portion can be used for vehicle passage.

Advantages of the Invention

[0018] According to the floor slab erection structure and the floor slab erection method of the present invention, the quality of the connection between floor slabs can be improved.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0020] Hereinafter, the floor slab erection structure and the floor slab erection method according to the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1(A) and 1(B), the floor slab erection structure and the floor slab erection method according to the first embodiment of the present invention are, for example, when replacing the existing floor slab 50 installed on the bridge girder, while the side surfaces of a plurality of newly installed floor slabs are opposed to each other with a gap therebetween in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2, it is for connecting the floor slabs. Wall height fences 130 and 230 are respectively installed on both ends of the existing floor slab 50 in the direction D2 perpendicular to the bridge axis. In the examples of FIGS. 1(A) and 1(B), the upper part of the existing floor slab 50 is used as a one-way two-lane road having a first lane 100 and a second lane 200.

[0021] As shown in FIGS. 1(C) and 1(D), the existing floor slab 50 is divided into two parts in the direction D2 perpendicular to the bridge axis along the sections of the first lane 100 and the second lane 200. The existing floor slab 50 and the wall height fence 130 in the first lane 100 are removed, and the existing floor slab 50 in the second lane 200 is left in place. A temporary protective fence 301 is installed on the end of the existing floor slab 50 left in the second lane 200 on the side opposite to the wall height fence 230. The upper part of the existing floor slab 50 left in the second lane 200 is used as a one-way one-lane road. The first lane 100 is closed to traffic.

[0022] As shown in FIGS. 1(E), 1(F), 3(A), 3(B) and 3(C), while the upper part of the existing floor slab 50 left in the second lane 200 is used as a one-way one-lane road, a first floor slab installation step of installing the first floor slab 110 in the first lane 100 is performed. While the side surface 113 of the first floor slab 110 installed in the first floor slab installation step and the side surface 123 of the second floor slab 120 are opposed to each other with a gap (horizontal joint) gh extending in the direction D2 perpendicular to the bridge axis therebetween, a second floor slab installation step of installing the second floor slab 120 in the first lane 100 is performed.

[0023] As shown in Fig. 3(B), at the gap (horizontal joint) gh, the side surface 113 includes the recess 110C, and the side surface 123 includes the recess 120C. From the respective recesses 110C and 120C of the first floor slab 110 and the second floor slab 120, reinforcing bars 114 and 124 with their bases embedded in the first floor slab 110 and the second floor slab 120 respectively and fixing bodies at their tip ends protrude. The reinforcing bars 114 and 124 are arranged overlapping each other in the bridge axis direction D1. Arrangement bars 140 are arranged along the direction D2 perpendicular to the bridge axis so as to be perpendicular to the reinforcing bars 114 and 124. Note that the first floor slab 110 has an upper surface 111 and a lower surface 112, and the second floor slab 120 has an upper surface 121 and a lower surface 122.

[0024] As shown in Fig. 3(A), Fig. 3(B), and Fig. 3(C), an upper support member arranging step of arranging an upper support member 11 for supporting the first floor slab 110 and the second floor slab 120 across the upper surface 111 of the first floor slab 110 installed in the first floor slab installation step and the upper surface 121 of the second floor slab 120 installed in the second floor slab installation step is performed. In the upper support member arranging step, a first upper contact portion 11u that contacts the upper surface 111 of the first floor slab 110, a second upper contact portion 11v that contacts the upper surface 121 of the second floor slab 120, and an upper support member 11 having an upper bridging portion 11w that supports the first floor slab 110 and the second floor slab 120 across the first upper contact portion 11u and the second upper contact portion 11v are arranged.

[0025] The first upper contact portion 11u and the second upper contact portion 11v are constituted by members separated from the upper bridging portion 11w. The first upper contact portion 11u and the second upper contact portion 11v are members formed from steel plates such as SM490 that are rectangular in plan view. The first upper contact portion 11u and the second upper contact portion 11v are respectively arranged on the upper surface 111 and the upper surface 121 with the gap gh therebetween. The upper bridging portion 11w is a member formed from steel materials such as SM490 having a length that straddles the first upper contact portion 11u and the second upper contact portion 11v respectively arranged on the upper surface 111 and the upper surface 121 with the gap gh therebetween from above.

[0026] The upper bridging portion 11w includes a convex portion 11b that protrudes from the center of its lower surface and faces the gap gh. The protruding length of the convex portion 11b is equal to or less than the thicknesses of the first upper contact portion 11u and the second upper contact portion 11v. The upper bridging portion 11w abuts from above across the first upper contact portion 11u and the second upper contact portion 11v that are respectively disposed on the upper surface 111 and the upper surface 121 with the gap gh therebetween. The convex portion 11b enters between the first upper contact portion 11u and the second upper contact portion 11v and faces the gap gh. The upper bridging portion 11w has a hole portion 11h that opens to the convex portion 11b. The hole portion 11h may penetrate to the surface on the side opposite to the convex portion 11b, but in this embodiment, the hole portion 11h is a bottomed hole for a bolt that does not penetrate to the surface on the side opposite to the convex portion 11b.

[0027] In a state where the upper bridging portion 11w supports the first floor slab 110 and the second floor slab 120 across the first upper contact portion 11u and the second upper contact portion 11v, a recessed portion 11C that is recessed facing the gap gh is formed by the first upper contact portion 11u and the second upper contact portion 11v that are respectively disposed on the upper surface 111 and the upper surface 121 with the gap gh therebetween and the convex portion 11b of the upper bridging portion 11w that faces the gap gh. That is, the upper support member 11 as a whole has a recessed portion 11C that is recessed facing the gap gh.

[0028] In this embodiment, for example, after the first floor slab installation process and the second floor slab installation process, the first upper contact portion 11u and the second upper contact portion 11v are respectively disposed on the upper surface 111 and the upper surface 121 with the gap gh therebetween, and the upper bridging portion 11w is disposed across the first upper contact portion 11u and the second upper contact portion 11v such that the convex portion 11b enters between the first upper contact portion 11u and the second upper contact portion 11v and faces the gap gh, whereby the upper support member placement process is performed.

[0029] As shown in FIGS. 4(A), 4(B), and 4(C), a lower support member arranging step is performed to arrange a lower support member 12 that supports the first floor slab 110 and the second floor slab 120 across the lower surface 112 of the first floor slab 110 installed in the first floor slab installation step and the lower surface 122 of the second floor slab 120 installed in the second floor slab installation step. In the lower support member arranging step, a first lower contact portion 12u that contacts the lower surface 112 of the first floor slab 110, a second lower contact portion 12v that contacts the lower surface 122 of the second floor slab 120, and a lower bridging portion 12w that supports the first floor slab 110 and the second floor slab 120 across the first lower contact portion 12u and the second lower contact portion 12v are arranged.

[0030] The first lower contact portion 12u and the second lower contact portion 12v are constituted by members separated from the lower bridging portion 12w. The first lower contact portion 12u and the second lower contact portion 12v are members formed from a steel plate such as SM490 that is rectangular in plan view. The first lower contact portion 12u and the second lower contact portion 12v are respectively arranged on the lower surfaces 112 and 122 with a gap gh therebetween. The lower bridging portion 12w is a member formed from a steel material such as SM490 having a length that straddles the first lower contact portion 12u and the second lower contact portion 12v respectively arranged on the lower surfaces 112 and 122 with a gap gh therebetween from below.

[0031] The lower bridging portion 12w includes a convex portion 12b that protrudes from the center of its upper surface and faces the gap gh. The protruding length of the convex portion 12b is equal to or less than the thicknesses of the first lower contact portion 12u and the second lower contact portion 12v. The lower bridging portion 12w contacts the first lower contact portion 12u and the second lower contact portion 12v respectively arranged on the lower surfaces 112 and 122 with a gap gh therebetween from below. The convex portion 12b enters between the first lower contact portion 12u and the second lower contact portion 12v and faces the gap gh. The lower bridging portion 12w has a hole portion 12h that opens to the convex portion 12b. In this embodiment, the hole portion 12h is a bolt hole portion that is a through hole penetrating to the surface on the side opposite to the convex portion 12b.

[0032] In a state where the lower bridging portion 12w supports the first floor slab 110 and the second floor slab 120 across the first lower contact portion 12u and the second lower contact portion 12v, a concave portion 12C that is recessed facing the gap gh is formed by the first lower contact portion 12u and the second lower contact portion 12v respectively arranged on the lower surfaces 112 and 122 with a gap gh therebetween and the convex portion 12b of the lower bridging portion 12w facing the gap gh. That is, the lower support member 12 as a whole has a concave portion 12C that is recessed facing the gap gh.

[0033] A fastening process is performed to fasten the upper support member 11 arranged in the upper support member arrangement process and the lower support member 12 arranged in the lower support member arrangement process with a fastening member 14. In the fastening process, the upper bridging portion 11w and the lower bridging portion 12w are fastened by a fastening member 14 that extends across the upper bridging portion 11w of the upper support member 11 and the lower bridging portion 12w of the lower support member 12 inside a pipe member 13 that extends in the vertical direction in the gap gh.

[0034] The fastening member 14 is arranged inside a pipe member 13 such as a sheath pipe arranged in the gap gh and extends across the upper bridging portion 11w and the lower bridging portion 12w. The fastening member 14 includes a bolt 14b and two nuts 14n. The bolt 14b is provided with screw threads at both ends. The bolt 14b may be, for example, a PC steel bar provided with screw threads at both ends. The upper end of the bolt 14b is screwed into the hole portion 11h of the upper bridging portion 11w. The lower end of the bolt 14b is inserted through the hole portion 12h of the lower support member 12, and the two nuts 14n are respectively screwed thereon.

[0035] In this embodiment, for example, after the upper support member arrangement step, the upper end of the bolt 14b of the fastening member 14 is screwed into the hole 11h of the upper bridging portion 11w of the upper support member 11. The pipe member 13 is arranged in the gap gh so that the bolt 14b is arranged inside the pipe member 13. With the gap gh interposed therebetween, the first lower contact portion 12u and the second lower contact portion 12v of the lower support member 12 are respectively arranged on the lower surface 112 and the lower surface 122. While inserting the lower end of the bolt 14b of the fastening member 14 into the hole 12h of the lower bridging portion 12w of the lower support member 12, two nuts 14n are respectively screwed onto the lower end of the bolt 14b, whereby the lower support member arrangement step and the fastening step are performed.

[0036] Most of the above upper support member arrangement step, lower support member arrangement step, and fastening step can be performed from the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120. Before the fastening step, the force reinforcement 140 is arranged closer to either the side surface 113 of the first floor slab 110 or the side surface 123 of the second floor slab 120 so as not to obstruct the arrangement of the pipe member 13 in the gap gh.

[0037] After the fastening step, the floor slab erection structure 1 of this embodiment is formed. The erection structure 1 of this embodiment connects the first floor slab 110 and the second floor slab 120 while opposing the side surface 113 of the first floor slab 110 and the side surface 123 of the second floor slab 120 across the gap (lateral joint) gh. The erection structure 1 is formed from the erection jig 10. The erection jig 10 includes an upper support member 11, a lower support member 12, a pipe member 13, and a fastening member 14.

[0038] The erection structure 1 includes an upper support member 11 that supports the first floor slab 110 and the second floor slab 120 across the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120, a lower support member 12 that supports the first floor slab 110 and the second floor slab 120 across the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120, and a fastening member 14 that fastens the upper support member 11 and the lower support member 12.

[0039] As described above, the upper support member 11 has a first upper contact portion 11u that contacts the upper surface 111 of the first floor slab 110, a second upper contact portion 11v that contacts the upper surface 121 of the second floor slab 120, and an upper bridging portion 11w that supports the first floor slab 110 and the second floor slab 120 across the first upper contact portion 11u and the second upper contact portion 11v. Further, the lower support member 12 has a first lower contact portion 12u that contacts the lower surface 112 of the first floor slab 110, a second lower contact portion 12v that contacts the lower surface 122 of the second floor slab 120, and a lower bridging portion 12w that supports the first floor slab 110 and the second floor slab 120 across the first lower contact portion 12u and the second lower contact portion 12v.

[0040] The first upper contact portion 11u and the second upper contact portion 11v are constituted by members separated from the upper bridging portion 11w. Further, the first lower contact portion 12u and the second lower contact portion 12v are constituted by members separated from the lower bridging portion 12w. Note that only one of the first upper contact portion 11u and the second upper contact portion 11v may be constituted by a member separated from the upper bridging portion 11w. Also, only one of the first lower contact portion 12u and the second lower contact portion 12v may be constituted by a member separated from the lower bridging portion 12w. Further, only one of the upper support member 11 and the lower support member 12 may be constituted by a member separated from each of the upper bridging portion 11w and the lower bridging portion 12w. Also, the upper support member 11 and the lower support member 12 may be constituted by an integrated member.

[0041] (Horizontal joint) As shown in FIGS. 5(A), 5(B), and 5(C), after the fastening step, a filling step is performed in which a filling and solidifying material is filled outside the pipe member 13 in the gap gh, and the filling and solidifying material is solidified over time to generate a filling and solidifying body 15. In the filling step, the reinforcing bars 114 and 124 protruding into the gap gh are embedded by the filling and solidifying body 15. The erected structure 1 after the filling step further includes a pipe member 13 disposed in the gap gh and extending in the vertical direction, and a filling and solidifying body 15 filled outside the pipe member 13 in the gap gh. The fastening member 14 extends inside the pipe member 13 across the upper bridging portion 11w and the lower bridging portion 12w.

[0042] In addition, in the gap (horizontal joint) gh, since it is a reinforced concrete structure, the recesses 110C on the side surfaces 113 facing each other and the recesses 120C on the side surfaces 123 do not necessarily need to exist. The recesses 110C and 120C are provided to ensure the length of the upper support member 11 abutting across the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120, and the length of the lower support member 12 abutting across the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120 in the gap (horizontal joint) gh.

[0043] As shown in FIGS. 6(A), 6(B), and 6(C), a removal process of removing the fastening member 14 after the filling process is performed. In the present embodiment, in the removal process, the upper support member 11 and the lower support member 12 are also removed after the filling process. Further, in the removal process, the pipe member 13 is also removed after the filling process. After the removal of the pipe member, a hole 16 is formed in the filled solid by the pipe member 13.

[0044] As shown in FIGS. 7(A), 7(B), and 7(C), a hole filling process of filling the hole 16 formed by the filled solid 15 with the filling material 17 by the pipe member 13 is performed after the removal process. In the hole filling process, the hole 16 is filled with the filling material 17 after the pipe member 13 is removed in the removal process. In this way, the connection between the first floor slab 110 and the second floor slab 120 facing each other across the gap (horizontal joint) gh extending in the direction perpendicular to the bridge axis D2 is completed.

[0045] As shown in FIGS. 1(G) and 1(H), a wall railing 130 and a temporary protective fence 301 are installed on the first lane 100 where the first floor slab 110 and the second floor slab 120 are installed. As shown in FIGS. 1(I) and 1(J), in the first lane 100, a paving process is performed to apply the main paving 60 to the upper surfaces of all floor slabs such as the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120. The area above the first floor slab 110 and the second floor slab 120 installed on the first lane 100 is used as a one-way single-lane road. On the other hand, the existing floor slab 50, the wall railing 230, and the temporary protective fence 301 remaining on the second lane 200 are removed. The second lane 200 is closed to traffic.

[0046] (Longitudinal joint) As shown in FIGS. 1(K), 1(L), 8(A), 8(B), and 8(C), in the second floor slab installation process, the second floor slab 220 is installed on the second lane 200 while the side surface 113 of the first floor slab 110 installed on the first lane 100 in the first floor slab installation process and the side surface 223 of the second floor slab 220 are opposed to each other with a gap (longitudinal joint) gv extending in the bridge axis direction D1 therebetween. As shown in FIG. 8(B), in the gap (longitudinal joint) gv, the side surface 113 includes a recess 110c and the side surface 223 includes a recess 220c. Also, the second floor slab 120 has an upper surface 221 and a lower surface 222.

[0047] Similarly to the above, an upper support member arrangement process of arranging an upper support member 11 that supports the first floor slab 110 and the second floor slab 220 across the upper surface 111 of the first floor slab 110 installed in the first floor slab installation process and the upper surface 221 of the second floor slab 220 installed in the second floor slab installation process, a lower support member arrangement process of arranging a lower support member 12 that supports the first floor slab 110 and the second floor slab 220 across the lower surface 112 of the first floor slab 110 installed in the first floor slab installation process and the lower surface 222 of the second floor slab 220 installed in the second floor slab installation process, a fastening process of fastening the upper support member 11 arranged in the upper support member arrangement process and the lower support member 12 arranged in the lower support member arrangement process with a fastening member 14, and a filling process of filling a gap-filling solidifying material outside the pipe member 13 in the gap gv after the fastening process to generate a gap-filling solid 15 are performed.

[0048] As shown in FIGS. 8(A), 8(B), and 8(C), the erection structure 1 of the present embodiment connects the first floor slab 110 and the second floor slab 220 while facing the side surface 113 of the first floor slab 110 and the side surface 223 of the second floor slab 220 across a gap (longitudinal joint) gv. The erection structure 1 includes an upper support member 11 that supports the first floor slab 110 and the second floor slab 220 across the upper surfaces 111 of the first floor slab 110 and the second floor slab 220, a lower support member 12 that supports the first floor slab 110 and the second floor slab 220 across the lower surfaces 112 of the first floor slab 110 and the second floor slab 220, and a fastening member 14 that fastens the upper support member 11 and the lower support member 12.

[0049] The configurations of the first upper contact portion 11u, the second upper contact portion 11v, and the upper bridging portion 11w of the upper support member 11 and the first lower contact portion 12u, the second lower contact portion 12v, and the lower bridging portion 12w of the lower support member 12 are the same as those of the erection structure 1 in the above-described gap (transverse joint) gh. Also, the configurations of the pipe member 13, the fastening member 14, and the filling solid 15 are the same as those of the erection structure 1 in the above-described gap (transverse joint) gh.

[0050] As shown in FIG. 8(B), the first floor slab 110 and the second floor slab 220 of the present embodiment each have a tension member insertion hole portion 110h, 220h extending in the direction D2 perpendicular to the bridge axis. As shown in FIGS. 2(A) and 2(B), a tension member 400 is inserted through the tension member insertion hole portions 110h, 220h, and post-tensioning is applied between the first floor slab 110 and the second floor slab 220. Similarly to the above, a removal process and a hole filling process are performed.

[0051] In this way, the connection between the first floor slab 110 and the second floor slab 220 facing each other across the gap (longitudinal joint) gv extending in the bridge axis direction D1 is completed. In the gap (longitudinal joint) gv, the filling solid 15 is filled between the recess 110c of the side surface 113 and the recess 220c of the side surface 223 facing each other, and functions as a shear key against the force shearing the first floor slab 110 and the second floor slab 220 in the vertical direction.

[0052] As shown in FIGS. 2(A), 2(B), 2(C), and 2(D), the connection of the second floor slab 220 at the gap gh in the second lane 200 is performed in the same manner as the first lane 100 described above. As shown in FIGS. 2(E) and 2(F), in the second lane 200, a paving process of applying the main paving 60 to the upper surfaces of all the floor slabs such as the upper surface 221 of the second floor slab 220 is performed. The temporary guardrail 301 installed in the first lane 100 is removed, and the wall high railing 203 is installed in the second lane 200. The upper part of the first floor slab 110 and the second floor slab 220 is reused as a one-sided two-lane road having the first lane 100 and the second lane 200. In this way, the replacement of the existing floor slab 50 is completed.

[0053] According to the present embodiment, in the floor slab erection structure 1 that connects the first floor slab 110 and the second floor slab 120 while opposing the side surface 113 of the first floor slab 110 and the side surface 123 of the second floor slab 120 with a gap gh therebetween, an upper support member 11 that supports the first floor slab 110 and the second floor slab 120 across the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120, and a lower support member 12 that supports the first floor slab 110 and the second floor slab 120 across the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120 are fastened by a fastening member 14, and the first floor slab 110 and the second floor slab 120 are fixed so as not to move. Therefore, the quality of the connection between the floor slabs can be improved.

[0054] Further, in the present embodiment, in a state where the first floor slab 110 and the second floor slab 120 are fixed so as not to move by the upper support member 11 and the lower support member 12, the filling solid 15 is filled outside the pipe member 13, and the fastening member 14 is separated from the filling solid 15 inside the pipe member 13. Therefore, the influence on the placement and curing of the filling solid 15 in the gap due to vibrations such as vehicle passage is reduced, and the quality of the connection between the floor slabs can be improved.

[0055] In addition, in the present embodiment, since either one of the first upper contact portion 11u and the second upper contact portion 11v is configured by a member separated from the upper bridging portion 11w, it is easy to cope with fluctuations in the angle between the first floor slab 110 and the second floor slab 120 due to vibrations, construction errors, etc. Also, in the present embodiment, since either one of the first lower contact portion 12u and the second lower contact portion 12v is configured by a member separated from the lower bridging portion 12w, it is easy to cope with fluctuations in the angle between the first floor slab 110 and the second floor slab 120 due to vibrations, construction errors, etc. Further, according to the present embodiment, since the upper support member 11 and the lower support member 12 have recessed portions 11C and 12C that are recessed facing the gap gh, it is easy to cope with fluctuations in the angle between the first floor slab 110 and the second floor slab 120 due to vibrations, construction errors, etc.

[0056] Also, in the present embodiment, by performing the upper support member arrangement step, the lower support member arrangement step, and the fastening step as described above, most of the work can be performed from the side of the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120, improving the convenience of replacing the floor slab.

[0057] Further, according to the present embodiment, in the removal step, after the plugging step, the fastening member 14 that extended across the upper support member 11 and the lower support member 12 inside the pipe member 13 is removed. Therefore, the plugging solidified body 15 filled outside the pipe member 13 in the plugging step does not become an obstacle, and the fastening member 14 can be removed easily. Also, in the hole filling step, after the removal step, the filling material 17 is filled into the hole 16 formed in the plugging solidified body 15 by the pipe member 13. Therefore, after the removal step and the hole filling step, the portion of the gap gh can be made available for vehicle passage.

[0058] Moreover, according to the present embodiment, in the removal step, the pipe member 13 is removed after the plugging step, and in the hole filling step, the filling material 17 is filled into the hole 16 after the pipe member 13 is removed in the removal step. Therefore, the hole 16 can be filled with the filling material 17 without leaving the pipe member 13 in the hole 16.

[0059] As described above, the embodiments of the present invention have been explained. However, the present invention is not limited to the above embodiments and can be implemented in various forms. For example, in the above embodiments, the bridge girder may be of various types such as a plate girder or a truss girder. The side surfaces 113 of the first floor slab 110 and the side surfaces 123, 223 of the second floor slabs 120, 220 may be provided with other types of joint reinforcing bars protruding into the gaps gh, gv. The side surfaces 113 of the first floor slab 110 and the side surfaces 123, 223 of the second floor slabs 120, 220 may be provided with shear keys that fit together or shear keys that do not contact each other. Further, the upper support member 11 and the lower support member 12 may be formed of concrete such as high-strength concrete precast members and carbon fiber, in addition to iron such as steel, castings, and stainless steel.

[0060] Also, for example, in the second floor slab installation step, the second floor slab 120 may be moved and installed with the upper support member 11, the lower support member 12, the pipe member 13, and the fastening member 14 of the erection jig 10 attached thereto. For example, the upper support member 11 is brought into contact with the upper surface 121 near the side surface 123 of the second floor slab 120, the lower support member 12 is brought into contact with the lower surface 122 near the side surface 123 of the second floor slab 120, and the upper support member 11 and the lower support member 12 are fastened by a fastening member 14 extending across the upper support member 11 and the lower support member 12 inside the pipe member 13 extending in the vertical direction near the side surface 123 of the second floor slab 120, and the second floor slab 120 may be moved and installed. By appropriately adjusting the strength occupied by the nut 14n of the fastening member 14, the erection jig 10 is fixed to the second floor slab 120.

[0061] In the upper support member arranging step, the nut 14n of the fastening member 14 is loosened, and the upper support member 11 that is abutted against the upper surface 121 near the side surface 123 of the second floor slab 120 is moved, whereby the upper support member 11 is arranged across the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120. Also, in the lower support member arranging step, the nut 14n of the fastening member 14 is loosened, and the lower support member 12 that is abutted against the lower surface 122 near the side surface 123 of the second floor slab 120 is moved, whereby the lower support member 12 is arranged across the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120. In the fastening step, the upper support member 11 and the lower support member 12 are fastened by tightening again the nut 14n of the fastening member 14 that was loosened in the upper support member arranging step and the lower support member arranging step. Thereby, the working efficiency of each step is improved.

[0062] Also, for example, in the second floor slab installing step, the second floor slab 120 may be moved and installed with the upper support member 11 of the erection jig 10, the pipe member 13, and the bolt 14b of the fastening member 14 attached to the second floor slab 120. For example, the upper support member 11 is abutted against the upper surface 121 near the side surface 123 of the second floor slab 120, the upper end of the bolt 14b of the fastening member 14 is screwed into the hole portion 11h of the upper support member 11, and the second floor slab 120 may be moved and installed in a state where the pipe member 13 is arranged near the side surface 123 of the second floor slab 120 so that the bolt 14b is arranged inside the pipe member 13. The fixing of the upper support member 11, the pipe member 13, and the bolt 14b of the fastening member 14 to the second floor slab 120 may be by an adhesive or the like in addition to the frictional force between the upper support member 11 and the upper surface 121 of the second floor slab 120 due to the weight of the upper support member 11.

[0063] In the upper support member arranging step, the upper support member 11 that is abutted against the upper surface 121 near the side surface 123 of the second floor slab 120 is moved, whereby the upper support member 11 is arranged across the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120. In the lower support member arranging step, in the same manner as in the above-described embodiment, while inserting the lower end of the bolt 14b of the fastening member 14 into the hole portion 12h of the lower support member 12, the lower support member 12 is arranged across the lower surface 112 of the first floor slab 110 and the lower surface 122 of the second floor slab 120. In the fastening step, in the same manner as in the above-described embodiment, two nuts 14n are respectively screwed onto the lower end of the bolt 14b, whereby the upper support member 11 and the lower support member 12 are fastened. Thereby, the working efficiency of each step is improved.

[0064] Further, for example, if the construction time for replacing the floor slabs with traffic stops in each lane is limited to several hours at night, and several floor slabs in each lane are replaced during the several hours of construction at night and the lane is used outside the construction time including during the day, in the removal step, the upper support member 11 may be left on the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120.

[0065] For example, with the upper support member 11 left on the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120, a temporary paving step of performing temporary paving on the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120 may be carried out in the first lane 100. Outside the construction time including during the day after the temporary paving is performed, the first lane 100 and the second lane 200 are used as a one-way two-lane road. Until the replacement of the existing floor slabs 50 in the first lane 100 is completed, in the same manner as above, several existing floor slabs 50 in the first lane 100 are replaced during the several hours of construction at night, and the first lane 100 may be repeatedly used outside the construction time including during the day.

[0066] After completion of replacement of all of the existing floor slabs 50 of the first lane 100, the temporary paving and the upper support member 11 of the first lane 100 are removed. In the first lane 100, a final paving process is carried out in which final paving 60 is applied to the upper surfaces of all floor slabs such as the upper surface 111 of the first floor slab 110 and the upper surface 121 of the second floor slab 120. After completion of the final paving process in the first lane 100, the first floor slab 110 and the second floor slab 120 installed in the first lane 100 are used as a one-lane road on one side. The same applies to the second lane 200 as to the first lane 100.

[0067] In this aspect, when the construction time for replacement of floor slabs involving traffic stoppage in each lane is limited to a short time, in the removal process before the temporary paving process in which each lane becomes available for use, the upper support member 11 can be left in place. Therefore, replacement of floor slabs is made easier when the construction time for replacement of floor slabs is limited to a short time.

[0068] Also, when the construction time for replacement of floor slabs involving traffic stoppage in each lane is limited to a short time as described above, in the upper support member placement process, the upper support member 11 formed of concrete such as a high-strength concrete precast member and carbon fiber is placed. In the removal process, the upper support member 11 is not removed, and temporary paving and final paving 60 may be applied to the upper surfaces 111, 121 of the first floor slab 110 and the second floor slab 120 with the upper support member 11 being embedded. The upper support member 11 may be left in the recesses formed in the upper surfaces 111, 121 of the first floor slab 110 and the second floor slab 120.

[0069] In this aspect, when the construction time for replacement of floor slabs involving traffic stoppage in each lane is limited to a short time, in the removal process before the temporary paving process in which each lane becomes available for use, the upper support member 11 can be left in place, and furthermore, the upper support member can be left in place even before the final final paving process. Therefore, replacement of floor slabs is made easier when the construction time for replacement of floor slabs is limited to a short time.

Explanation of Reference Numerals

[0070] 1... Erection structure, 10... Erection jig, 11... Upper support member, 11u... First upper contact portion, 11v... Second upper contact portion, 11w... Upper bridging portion, 11b... Protrusion, 11h... Hole portion, 11C... Recess, 12... Lower support member, 12u... First lower contact portion, 12v... Second lower contact portion, 12w... Lower bridging portion, 12b... Protrusion, 12h... Hole portion, 12C... Recess, 13... Pipe member, 14... Fastening member, 14b... Bolt, 14n... Nut, 15... Filling solid, 16... Hole portion, 17... Filling material, 50... Existing floor slab, 60... Pavement, 100... First lane, 110... First floor slab, 110C... Recess, 110h... Tension member insertion hole portion, 111... Upper surface, 112... Lower surface, 113... Side surface, 114... Reinforcement, 120... Second floor slab, 121... Upper surface, 122... Lower surface, 123... Side surface, 124... Reinforcement, 120C... Recess, 130... Wall railing, 140... Force distribution bar, 200... Second lane, 220... Second floor slab, 220c... Recess, 220h... Tension member insertion hole portion, 221... Upper surface, 222... Lower surface, 223... Side surface, 230... Wall railing, 400... Tension member, gh... Gap (horizontal joint), gv... Gap (vertical joint), D1... Bridge axis direction, D2... Direction perpendicular to the bridge axis.

Claims

1. A floor slab erection structure for connecting a first floor slab and a second floor slab while facing the side surface of the first floor slab and the side surface of the second floor slab with a gap therebetween, an upper support member that supports the first floor slab and the second floor slab across the upper surfaces of the first floor slab and the second floor slab, a lower support member that supports the first floor slab and the second floor slab across the lower surfaces of the first floor slab and the second floor slab, a fastening member that fastens the upper support member and the lower support member, a filling solidified body filled in the gap, comprising: the upper support member has a first upper contact portion that contacts the upper surface of the first floor slab, a second upper contact portion that contacts the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper contact portion and the second upper contact portion, the lower support member has a first lower contact portion that contacts the lower surface of the first floor slab, a second lower contact portion that contacts the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower contact portion and the second lower contact portion, a floor slab erection structure.

2. A floor slab erection structure for connecting a first floor slab and a second floor slab while facing the side surface of the first floor slab and the side surface of the second floor slab with a gap therebetween, an upper support member that supports the first floor slab and the second floor slab across the upper surfaces of the first floor slab and the second floor slab, a lower support member that supports the first floor slab and the second floor slab across the lower surfaces of the first floor slab and the second floor slab, a fastening member that fastens the upper support member and the lower support member, comprising: the upper support member has a first upper contact portion that contacts the upper surface of the first floor slab, a second upper contact portion that contacts the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper contact portion and the second upper contact portion, the lower support member has a first lower contact portion that contacts the lower surface of the first floor slab, a second lower contact portion that contacts the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower contact portion and the second lower contact portion, a pipe member disposed in the gap and extending in the vertical direction, a filling solidified body filled outside the pipe member in the gap, further comprising: the fastening member extends across the upper bridging portion and the lower bridging portion inside the pipe member, a floor slab erection structure.

3. The floor slab erection structure according to claim 2, wherein either one of the first upper contact portion and the second upper contact portion is configured by a member separated from the upper bridging portion.

4. The floor slab erection structure according to claim 2, wherein either one of the first lower contact portion and the second lower contact portion is configured by a member separated from the lower bridging portion.

5. A method for erecting floor slabs, comprising: facing the side surface of the first floor slab and the side surface of the second floor slab to face each other with a gap therebetween, and connecting the first floor slab and the second floor slab, a first floor slab installation step of installing the first floor slab; a second floor slab installation step of installing the second floor slab while facing the side surface of the first floor slab installed in the first floor slab installation step and the side surface of the second floor slab with the gap therebetween; an upper support member arrangement step of arranging an upper support member that supports the first floor slab and the second floor slab across the upper surface of the first floor slab installed in the first floor slab installation step and the upper surface of the second floor slab installed in the second floor slab installation step; a lower support member arrangement step of arranging a lower support member that supports the first floor slab and the second floor slab across the lower surface of the first floor slab installed in the first floor slab installation step and the lower surface of the second floor slab installed in the second floor slab installation step; a fastening step of fastening the upper support member arranged in the upper support member arrangement step and the lower support member arranged in the lower support member arrangement step with a fastening member; characterized by comprising In the upper support member arrangement step, the upper support member having a first upper contact portion that contacts the upper surface of the first floor slab, a second upper contact portion that contacts the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper contact portion and the second upper contact portion is arranged; In the lower support member arrangement step, the lower support member having a first lower contact portion that contacts the lower surface of the first floor slab, a second lower contact portion that contacts the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower contact portion and the second lower contact portion is arranged; After the fastening step, the floor slab erection method further comprises a filling step of filling the gap with a filling solidifying material to generate a filled solidified body in a state where the upper support member, the lower support member, and the fastening member are attached to the first floor slab and the second floor slab. A method for installing floor slabs, which connects a first floor slab and a second floor slab while keeping a gap between the side surface of the first floor slab and the side surface of the second floor slab and facing each other, a first floor slab installation step of installing the first floor slab; a second floor slab installation step of installing the second floor slab while keeping a gap between the side surface of the first floor slab installed in the first floor slab installation step and the side surface of the second floor slab and facing each other; an upper support member arrangement step of arranging an upper support member that supports the first floor slab and the second floor slab across the upper surface of the first floor slab installed in the first floor slab installation step and the upper surface of the second floor slab installed in the second floor slab installation step; a lower support member arrangement step of arranging a lower support member that supports the first floor slab and the second floor slab across the lower surface of the first floor slab installed in the first floor slab installation step and the lower surface of the second floor slab installed in the second floor slab installation step; a fastening step of fastening the upper support member arranged in the upper support member arrangement step and the lower support member arranged in the lower support member arrangement step with a fastening member; characterized by comprising: in the upper support member arrangement step, arranging the upper support member having a first upper contact portion that contacts the upper surface of the first floor slab, a second upper contact portion that contacts the upper surface of the second floor slab, and an upper bridging portion that supports the first floor slab and the second floor slab across the first upper contact portion and the second upper contact portion; in the lower support member arrangement step, arranging the lower support member having a first lower contact portion that contacts the lower surface of the first floor slab, a second lower contact portion that contacts the lower surface of the second floor slab, and a lower bridging portion that supports the first floor slab and the second floor slab across the first lower contact portion and the second lower contact portion; in the fastening step, fastening the upper bridging portion and the lower bridging portion with a fastening member that extends across the upper bridging portion and the lower bridging portion inside a pipe member that extends in the vertical direction in the gap; The method for installing floor slabs further comprises a plugging step of filling a plugging solidifying material outside the pipe member in the gap after the fastening step to generate a plugged solidified body.

7. a removing step of removing the fastening member after the plugging step; a hole filling step of filling a filler into a hole formed in the plugged solidified body by the pipe member after the removing step; The method for installing floor slabs according to claim 6, further comprising:

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